Area Code 517-547 located in PITTSFORD, HILLSDALE, MI, more detail is as below. Place NPA (Numbering Plan Area) : 517 NXX (Local Number Prefix) : 547 City : PITTSFORD County : HILLSDALE State : MI (Michigan) NXX Use Type : Landline NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 26059 LATA (Local Access Transport Area) : 346 Rate Center : ADDISON ZIP Code Count : 66 ZIP Code Frequency : 2 ZIP Code : 49271 Other Information NPANXX : 517547 County Population : 0 Switch CLLI (Common Language Location Identifier) : ADSNMIXIDS0 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : FRONTIER MIDSTATES, INC. - MI OCN (Operating Company Number) : 0681 Coverage Area Name : ADDISON Latitude : 41.9871 Longitude : -84.3466 ‹ previous : 517-547 next › : 517-547 Telephone Number List 517-547-0000 ~ 517-547-9999